Commit f0f2f9fe authored Sep 15, 2020 by Fenghua Yu Committed by Borislav Petkov Sep 17, 2020

x86/msr-index: Define an IA32_PASID MSR



The IA32_PASID MSR (0xd93) contains the Process Address Space Identifier
(PASID), a 20-bit value. Bit 31 must be set to indicate the value
programmed in the MSR is valid. Hardware uses the PASID to identify a
process address space and direct responses to the right address space.

Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/1600187413-163670-7-git-send-email-fenghua.yu@intel.com

parent b454feb9

arch/x86/include/asm/msr-index.h

+3 −0

Original line number	Diff line number	Diff line
		@@ -257,6 +257,9 @@
		#define MSR_IA32_LASTINTFROMIP 0x000001dd
		#define MSR_IA32_LASTINTTOIP 0x000001de

		#define MSR_IA32_PASID 0x00000d93
		#define MSR_IA32_PASID_VALID BIT_ULL(31)

		/* DEBUGCTLMSR bits (others vary by model): */
		#define DEBUGCTLMSR_LBR (1UL << 0) /* last branch recording */
		#define DEBUGCTLMSR_BTF_SHIFT 1

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